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A Reaction Progress Variable Modeling Approach For Non-Ideal Multiphase Explosives, K. P. Ruggirello, P. E. Desjardin, M. R. Baer, M. J. Kaneshige, E. S. Hertel
A Reaction Progress Variable Modeling Approach For Non-Ideal Multiphase Explosives, K. P. Ruggirello, P. E. Desjardin, M. R. Baer, M. J. Kaneshige, E. S. Hertel
US Department of Energy Publications
This study concerns the development of a mixture fraction based reaction progress variable formulation for aluminized explosives. Highlights of the formulation include a fully compressible treatment of both the gas and solid phases (both aluminum and alumina), heterogenous and homogenous reactions, and effects of group combustion. Isolated particle simulations are validated against experimental data and DNS and show good agreement of burn times over a range of pressure and oxygen environments. The new models are implemented in the CTH shock physics code using a fractional step approach to allow for efficient computation of particle dynamics. Comparisons are made to experimental …
An Experimental And Theoretical Study Of Heat And Mass Transfer During The Venting Of Gas From Pressure Vessels, W. S. Winters, G. H. Evans, S. F. Rice, R. Greif
An Experimental And Theoretical Study Of Heat And Mass Transfer During The Venting Of Gas From Pressure Vessels, W. S. Winters, G. H. Evans, S. F. Rice, R. Greif
US Department of Energy Publications
Non condensing gas flow and heat transfer during venting of vessels are studied using experiments and analysis. A high pressure helium supply vessel is connected to a low pressure receiver via orifice and tubing. A single control volume analysis and a multi-dimensional analysis are used to predict pressure and mass-averaged temperature in the supply. Experiments utilizing transient PVT methods are conducted to obtain transient pressure and mass-averaged temperature data for validating the analysis. Measured transient pressures and mass-averaged temperatures in the supply are reproduced by analysis. Heat transfer is due to natural convection except for the early part of transfer.